Describes how Monitoring-Based Commissioning, a program approach that combines permanent building energy system monitoring with standard retrocommissioning practices, can provide substantial, persistent energy savings. Permanent monitoring systems can identify previously unrecognizable and unquantifiable savings opportunities, such as equipment cycling, excessive simultaneous heating and cooling, or the unintended nighttime operation of HVAC and lighting equipment that would not be apparent from monthly utility readings. A pilot program conducted at 25 California university campuses demonstrated that MBCx has the ability to reduce peak-period and total annual electricity use, trend and benchmark building-performance data continuously, catch problems with control systems that are normally hard to detect, andi dentify cost-effective retrofit opportunities.
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